Okay - I got a box full of parts today. I had just replaced the gray valve so I didn't want to go through that hassle again. That new valve will come off with that Thetford bayonet fitting leaving me with just the black water slide valve.
So, the parts I got are:
- black water slide valve rebuild kit. It looks like what I need, assuming I can get the valve apart
- Thetford-to-Valterra adapter. It fits nicely.
- New Valterra cap w/ hose fitting for gray water. It fits the adapter nicely
When installed, it doesn't stick out too far. It looks good.
I also got a Valterra-style stinky slinky fitting that I can install on my existing hose (it's new, too). It will meet up with the aforementioned adapter.
All told, $48 including shipping. Had I put in new valves and a Y assembly, I'd have needed the hose fitting and cap anyway. So I'm about $30 in with the rebuild kit and Thetford-to-Valterra adapter.
If the rebuild kit doesn't work, I'm in for a lot more work but not a ton more $$.
